/**
 * Copyright (c) 2011-2023, James Zhan 詹波 (jfinal@126.com).
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.jfinal.template.stat;

import java.util.HashMap;
import java.util.Map;

/**
 * Symbol
 */
enum Symbol {

    TEXT("text", false),

    OUTPUT("output", true),

    DEFINE("define", true),
    CALL("call", true),
    CALL_IF_DEFINED("callIfDefined", true),
    SET("set", true),
    SET_LOCAL("setLocal", true),
    SET_GLOBAL("setGlobal", true),
    INCLUDE("include", true),

    FOR("for", true),
    IF("if", true),
    ELSEIF("elseif", true),
    ELSE("else", false),
    END("end", false),
    CONTINUE("continue", false),
    BREAK("break", false),
    RETURN("return", false),
    RETURN_IF("returnIf", true),

    SWITCH("switch", true),
    CASE("case", true),
    DEFAULT("default", false),

    ID("ID", false),				// 标识符：下划线或字母开头 ^[A-Za-z_][A-Za-z0-9_]*$
    PARA("PARA", false),

    EOF("EOF", false);

    private final String name;
    private final boolean hasPara;	// 是否有参

    @SuppressWarnings("serial")
    private static final Map<String, Symbol> keywords = new HashMap<String, Symbol>(64) {{
        put(Symbol.IF.getName(), IF);
        put(Symbol.ELSEIF.getName(), ELSEIF);
        put(Symbol.ELSE.getName(), ELSE);
        put(Symbol.END.getName(), END);
        put(Symbol.FOR.getName(), FOR);
        put(Symbol.BREAK.getName(), BREAK);
        put(Symbol.CONTINUE.getName(), CONTINUE);
        put(Symbol.RETURN.getName(), RETURN);
        put(Symbol.RETURN_IF.getName(), RETURN_IF);

        put(Symbol.SWITCH.getName(), SWITCH);
        put(Symbol.CASE.getName(), CASE);
        put(Symbol.DEFAULT.getName(), DEFAULT);

        put(Symbol.DEFINE.getName(), DEFINE);
        put(Symbol.SET.getName(), SET);
        put(Symbol.SET_LOCAL.getName(), SET_LOCAL);
        put(Symbol.SET_GLOBAL.getName(), SET_GLOBAL);
        put(Symbol.INCLUDE.getName(), INCLUDE);
    }};

    private Symbol(String name, boolean hasPara) {
        this.name = name;
        this.hasPara = hasPara;
    }

    public String getName() {
        return name;
    }

    public String toString() {
        return name;
    }

    boolean hasPara() {
        return hasPara;
    }

    boolean noPara() {
        return !hasPara;
    }

    public static Symbol getKeywordSym(String name) {
        return keywords.get(name);
    }
}




